How to use Virtual Dyno Properly
#109
Just to be clear.
It is the torque at the wheels, but converted to engine rpms. So it is numerically lower by the drive ratio (gear ratio and final drive ratio).
The actual torque at the wheels is higher by the drive ratio.
Put another way, drive train losses have been allowed for, but torque and power are only consistent if engine rpm is used to connect them.
Confusing?
It is the torque at the wheels, but converted to engine rpms. So it is numerically lower by the drive ratio (gear ratio and final drive ratio).
The actual torque at the wheels is higher by the drive ratio.
Put another way, drive train losses have been allowed for, but torque and power are only consistent if engine rpm is used to connect them.
Confusing?
#110
thanks for both answers
i think i get the point regarding torque at the wheels converted to engine RPM
drive train losses are not measured in any way by virtual dyno, so i would be strange if engine power or torque would be reported
the reason I am raising this question is the torque value I am getting from my e9
it should be something like 550 Nm at the crank, and virtual dyno shows 450 Nm (smoothing 5), while the power is reported at 310 WHP (still too high but by 5%)
the road is not perfect (smoothing 0 shows it), but is seems that peak boost of 30 PSI inflates the figures
i think i get the point regarding torque at the wheels converted to engine RPM
drive train losses are not measured in any way by virtual dyno, so i would be strange if engine power or torque would be reported
the reason I am raising this question is the torque value I am getting from my e9
it should be something like 550 Nm at the crank, and virtual dyno shows 450 Nm (smoothing 5), while the power is reported at 310 WHP (still too high but by 5%)
the road is not perfect (smoothing 0 shows it), but is seems that peak boost of 30 PSI inflates the figures
#111
Former Sponsor
iTrader: (31)
As long as the pulls are being done on a flat road and not down hill you should trust the numbers the program is telling you. Also be careful not to overpower your setup either if its still a stock internal engine.
You shouldn't really need to use no more then smoothing 2-3. and from smoothing 2-3 to max smoothing there shouldn't be more then a 10-12whp difference.
You shouldn't really need to use no more then smoothing 2-3. and from smoothing 2-3 to max smoothing there shouldn't be more then a 10-12whp difference.
#112
after several runs at 2 different boost settings I can confirm this
lower boost gave the same numbers as MAHA dyno (reckognized dyno in Europe),
but the atm pressure and temp corrections were necessary
30 PSI of peak boost falling to 20 PSI at 7,X RPMs is the limit, and so are the numbers for power and torque at the crank: 400HP/550Nm, this is the typical setup for "oem" engines here
lower boost gave the same numbers as MAHA dyno (reckognized dyno in Europe),
but the atm pressure and temp corrections were necessary
30 PSI of peak boost falling to 20 PSI at 7,X RPMs is the limit, and so are the numbers for power and torque at the crank: 400HP/550Nm, this is the typical setup for "oem" engines here
#113
Evolved Member
Hi,
Just tried to install VD from the website version 1.3.5 .. setup installs but when i double click the icon
a window appears saying " VD has stopped working " windows is checking the compatibility.. Window disappears.
I am using Macbook pro with windows 8..
Any one knows whats happening ?
Just tried to install VD from the website version 1.3.5 .. setup installs but when i double click the icon
a window appears saying " VD has stopped working " windows is checking the compatibility.. Window disappears.
I am using Macbook pro with windows 8..
Any one knows whats happening ?
#115
Evolved Member
#119
Evolved Member
Yes i am downloading the latest version . Doesnt work no matter what .